Unraveling the oxygen reduction reaction mechanism and activity of d-band perovskite electrocatalysts for low temperature alkaline fuel cells

Fabbri E, Mohamed R, Levecque P, Conrad O, Kötz R & Schmidt TJ
Choose the citation style.
Fabbri, E., Mohamed, R., Levecque, P., Conrad, O., Kötz, R., & Schmidt, T. J. (2014). Unraveling the oxygen reduction reaction mechanism and activity of d-band perovskite electrocatalysts for low temperature alkaline fuel cells. In K. Shinohara, S. R. Narayanan, K. Swider-Lyons, A. Weber, C. Coutanceau, R. Mantz, … P. Strasser (Eds.), ECS transactions: Vol. 64. Polymer electrolyte fuel cell symposium (pp. 1081-1093). https://doi.org/10.1149/06403.1081ecst
https://www.dora.lib4ri.ch/psi/islandora/object/psi:66174

Oxides with a perovskite structure have been recognized as potential catalysts for application in low temperature alkaline fuel cells. Although perovskites have been investigated for several decades as electrocatalysts for the oxygen reduction reaction (ORR), only recently improvements in the ORR activity have been reported, when perovskites are combined with various carbons. This contribution shows the enhancement in the ORR activity when Ba0.5Sr0.5Co0.8Fe0.2O3-δ is coupled with acid treated carbon black. Different mechanisms can account for the improved ORR activity of the composite cathode compared to the single catalyst. Perovskite surface utilization enhancement and synergistic ORR pathways will be discussed in this contribution.

Details
Publication Type

Proceedings Paper

Title

Unraveling the oxygen reduction reaction mechanism and activity of d-band perovskite electrocatalysts for low temperature alkaline fuel cells

Author(s)

Fabbri, E. (5423 Electrocatalysis and Interfaces)

Mohamed, R.

Levecque, P.

Conrad, O.

Kötz, R. (5423 Electrocatalysis and Interfaces)

Schmidt, T.J. (5400 Electrochemistry)

Conference Proceedings

Polymer electrolyte fuel cell symposium

Editor(s)

Shinohara, K. (editor)
Narayanan, S. R. (editor)
Swider-Lyons, K. (editor)
Weber, A. (editor)
Coutanceau, C. (editor)
Mantz, R. (editor)
Gasteiger, H. A. (editor)
Jones, D. (editor)
Edmundson, M. (editor)
Mitsushima, S. (editor)
Ramani, V. (editor)
Meas, Y. (editor)
Fuller, T. (editor)
Uchida, H. (editor)
Buchi, F. N. (editor)
Perry, K. A. (editor)
Schmidt, T. J. (editor)
Fenton, J. M. (editor)
Strasser, P. (editor)

Series Title

ECS transactions

Publisher

Electrochemical Society Inc.

Volume

64

Issue

3

Start Page

1081

End Page

1093

Publication Year

2014

Conference

14th polymer electrolyte fuel cell symposium, PEFC 2014 - 226th ECS meeting

Conference Place

Cancun

Conference Date

October 5-9, 2014

Collection

PSI Publications